It's well-known she married a gay man, John Dodds, in her fourth and final marriage. They remained married until her death in 1979.
Apparently, he had a long-time partner and also slept around on the side, which caused tension between him and Vivian. After Vivian's death, he lived out his days with his partner.
Why did she marry him? Was it a platonic relationship? Surely she knew he was gay going into the marriage.